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- /*
- * Copyright (C) 2023 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "render/passes/sky-pass.hpp"
- #include "resources/resource-manager.hpp"
- #include "gl/rasterizer.hpp"
- #include "gl/framebuffer.hpp"
- #include "gl/shader-program.hpp"
- #include "gl/shader-input.hpp"
- #include "gl/vertex-buffer.hpp"
- #include "gl/vertex-array.hpp"
- #include "gl/vertex-attribute.hpp"
- #include "gl/drawing-mode.hpp"
- #include "gl/texture-2d.hpp"
- #include "gl/texture-wrapping.hpp"
- #include "gl/texture-filter.hpp"
- #include "render/vertex-attribute.hpp"
- #include "render/context.hpp"
- #include "render/model.hpp"
- #include "render/material.hpp"
- #include "scene/camera.hpp"
- #include "utility/fundamental-types.hpp"
- #include "color/color.hpp"
- #include "math/interpolation.hpp"
- #include "geom/cartesian.hpp"
- #include "geom/spherical.hpp"
- #include "physics/orbit/orbit.hpp"
- #include "physics/light/photometry.hpp"
- #include <cmath>
- #include <stdexcept>
- #include <glad/glad.h>
-
- namespace render {
-
- sky_pass::sky_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, resource_manager* resource_manager):
- pass(rasterizer, framebuffer),
- mouse_position({0.0f, 0.0f}),
- sky_model(nullptr),
- sky_material(nullptr),
- sky_model_vao(nullptr),
- sky_shader_program(nullptr),
- moon_model(nullptr),
- moon_model_vao(nullptr),
- moon_material(nullptr),
- moon_shader_program(nullptr),
- stars_model(nullptr),
- stars_model_vao(nullptr),
- star_material(nullptr),
- star_shader_program(nullptr),
- observer_position_tween({0, 0, 0}, math::lerp<float3, float>),
- sun_position_tween(float3{1.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
- sun_luminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
- sun_illuminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
- icrf_to_eus_translation({0, 0, 0}, math::lerp<float3, float>),
- icrf_to_eus_rotation(math::quaternion<float>::identity(), math::nlerp<float>),
- moon_position_tween(float3{0, 0, 0}, math::lerp<float3, float>),
- moon_rotation_tween(math::quaternion<float>::identity(), math::nlerp<float>),
- moon_angular_radius_tween(0.0f, math::lerp<float, float>),
- moon_sunlight_direction_tween(float3{0, 0, 0}, math::lerp<float3, float>),
- moon_sunlight_illuminance_tween(float3{0, 0, 0}, math::lerp<float3, float>),
- moon_planetlight_direction_tween(float3{0, 0, 0}, math::lerp<float3, float>),
- moon_planetlight_illuminance_tween(float3{0, 0, 0}, math::lerp<float3, float>),
- moon_illuminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
- render_transmittance_lut(false),
- magnification(1.0f)
- {
- // Build quad VBO and VAO
- const float quad_vertex_data[] =
- {
- -1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, -1.0f, 0.0f
- };
- std::size_t quad_vertex_size = 3;
- std::size_t quad_vertex_stride = sizeof(float) * quad_vertex_size;
- std::size_t quad_vertex_count = 6;
- quad_vbo = new gl::vertex_buffer(sizeof(float) * quad_vertex_size * quad_vertex_count, quad_vertex_data);
- quad_vao = new gl::vertex_array();
- gl::vertex_attribute quad_position_attribute;
- quad_position_attribute.buffer = quad_vbo;
- quad_position_attribute.offset = 0;
- quad_position_attribute.stride = quad_vertex_stride;
- quad_position_attribute.type = gl::vertex_attribute_type::float_32;
- quad_position_attribute.components = 3;
- quad_vao->bind(render::vertex_attribute::position, quad_position_attribute);
-
- // Create transmittance LUT texture and framebuffer (32F color, no depth)
- transmittance_lut_texture = new gl::texture_2d(256, 64, gl::pixel_type::float_32, gl::pixel_format::rgb);
- transmittance_lut_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
- transmittance_lut_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
- transmittance_lut_texture->set_max_anisotropy(0.0f);
- transmittance_lut_framebuffer = new gl::framebuffer({transmittance_lut_texture->get_width(), transmittance_lut_texture->get_height()});
- transmittance_lut_framebuffer->attach(gl::framebuffer_attachment_type::color, transmittance_lut_texture);
- transmittance_lut_resolution = {static_cast<float>(transmittance_lut_texture->get_width()), static_cast<float>(transmittance_lut_texture->get_height())};
-
- // Load transmittance LUT shader template
- transmittance_shader_template = resource_manager->load<render::shader_template>("transmittance-lut.glsl");
-
- // Build transmittance LUT shader program
- transmittance_shader_program = transmittance_shader_template->build();
- transmittance_atmosphere_radii_input = transmittance_shader_program->get_input("atmosphere_radii");
- transmittance_rayleigh_parameters_input = transmittance_shader_program->get_input("rayleigh_parameters");
- transmittance_mie_parameters_input = transmittance_shader_program->get_input("mie_parameters");
- transmittance_ozone_distribution_input = transmittance_shader_program->get_input("ozone_distribution");
- transmittance_ozone_absorption_input = transmittance_shader_program->get_input("ozone_absorption");
- transmittance_resolution_input = transmittance_shader_program->get_input("resolution");
-
- // Create sky LUT texture and framebuffer (32F color, no depth)
- int sky_lut_width = 200;
- int sky_lut_height = 100;
- sky_lut_resolution = {static_cast<float>(sky_lut_width), static_cast<float>(sky_lut_height)};
- sky_lut_texture = new gl::texture_2d(sky_lut_width, sky_lut_height, gl::pixel_type::float_32, gl::pixel_format::rgb);
- sky_lut_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
- sky_lut_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
- sky_lut_texture->set_max_anisotropy(0.0f);
- sky_lut_framebuffer = new gl::framebuffer(sky_lut_width, sky_lut_height);
- sky_lut_framebuffer->attach(gl::framebuffer_attachment_type::color, sky_lut_texture);
-
- // Load sky LUT shader template
- sky_lut_shader_template = resource_manager->load<render::shader_template>("sky-illuminance-lut.glsl");
-
- // Build sky LUT shader program
- sky_lut_shader_program = sky_lut_shader_template->build();
- sky_lut_light_direction_input = sky_lut_shader_program->get_input("light_direction");
- sky_lut_light_illuminance_input = sky_lut_shader_program->get_input("light_illuminance");
- sky_lut_atmosphere_radii_input = sky_lut_shader_program->get_input("atmosphere_radii");
- sky_lut_observer_position_input = sky_lut_shader_program->get_input("observer_position");
- sky_lut_rayleigh_parameters_input = sky_lut_shader_program->get_input("rayleigh_parameters");
- sky_lut_mie_parameters_input = sky_lut_shader_program->get_input("mie_parameters");
- sky_lut_ozone_distribution_input = sky_lut_shader_program->get_input("ozone_distribution");
- sky_lut_ozone_absorption_input = sky_lut_shader_program->get_input("ozone_absorption");
- sky_lut_airglow_illuminance_input = sky_lut_shader_program->get_input("airglow_illuminance");
- sky_lut_resolution_input = sky_lut_shader_program->get_input("resolution");
- sky_lut_transmittance_lut_input = sky_lut_shader_program->get_input("transmittance_lut");
- sky_lut_transmittance_lut_resolution_input = sky_lut_shader_program->get_input("transmittance_lut_resolution");
- }
-
- sky_pass::~sky_pass()
- {
- delete sky_lut_framebuffer;
- delete sky_lut_texture;
- delete transmittance_lut_framebuffer;
- delete transmittance_lut_texture;
- delete quad_vao;
- delete quad_vbo;
-
- delete transmittance_shader_program;
- delete sky_lut_shader_program;
-
- /// @TODO
- // resource_maanger->unload("transmittance-lut.glsl");
- // resource_maanger->unload("sky-illuminance-lut.glsl");
- }
-
- void sky_pass::render(const render::context& ctx, render::queue& queue) const
- {
- glDisable(GL_BLEND);
- glDisable(GL_DEPTH_TEST);
- glDepthMask(GL_FALSE);
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
-
- // Render transmittance LUT if transmittance parameters have been altered.
- if (render_transmittance_lut)
- {
- // Render transmittance LUT
- rasterizer->set_viewport(0, 0, transmittance_lut_texture->get_width(), transmittance_lut_texture->get_height());
- rasterizer->use_framebuffer(*transmittance_lut_framebuffer);
- rasterizer->use_program(*transmittance_shader_program);
- transmittance_atmosphere_radii_input->upload(atmosphere_radii);
- transmittance_rayleigh_parameters_input->upload(rayleigh_parameters);
- transmittance_mie_parameters_input->upload(mie_parameters);
- transmittance_ozone_distribution_input->upload(ozone_distribution);
- transmittance_ozone_absorption_input->upload(ozone_absorption);
- if (transmittance_resolution_input)
- transmittance_resolution_input->upload(transmittance_lut_resolution);
- rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangles, 0, 6);
-
- // Don't render transmittance LUT next frame unless parameters have changed.
- render_transmittance_lut = false;
- }
-
- // Construct matrices
- const scene::camera& camera = *ctx.camera;
- float clip_near = camera.get_clip_near_tween().interpolate(ctx.alpha);
- float clip_far = camera.get_clip_far_tween().interpolate(ctx.alpha);
- float3 model_scale = float3{1.0f, 1.0f, 1.0f} * (clip_near + clip_far) * 0.5f;
- float4x4 model = math::scale(math::matrix4<float>::identity(), model_scale);
- float4x4 view = float4x4(float3x3(ctx.view));
- float4x4 model_view = view * model;
- const float4x4& projection = ctx.projection;
- float4x4 view_projection = projection * view;
- float4x4 model_view_projection = projection * model_view;
-
- // Interpolate observer position
- float3 observer_position = observer_position_tween.interpolate(ctx.alpha);
-
- // Construct tweened ICRF to EUS transformation
- math::transformation::se3<float> icrf_to_eus =
- {
- icrf_to_eus_translation.interpolate(ctx.alpha),
- icrf_to_eus_rotation.interpolate(ctx.alpha)
- };
-
- // Get EUS direction to sun
- float3 sun_position = sun_position_tween.interpolate(ctx.alpha);
- float3 sun_direction = math::normalize(sun_position);
-
- // Interpolate and expose sun luminance and illuminance
- float3 sun_illuminance = sun_illuminance_tween.interpolate(ctx.alpha) * ctx.exposure;
- float3 sun_luminance = sun_luminance_tween.interpolate(ctx.alpha) * ctx.exposure;
-
- float3 moon_position = moon_position_tween.interpolate(ctx.alpha);
- float3 moon_direction = math::normalize(moon_position);
- float3 moon_illuminance = moon_illuminance_tween.interpolate(ctx.alpha) * ctx.exposure;
- float moon_angular_radius = moon_angular_radius_tween.interpolate(ctx.alpha) * magnification;
-
- float sun_y = color::aces::ap1<float>.luminance(sun_transmitted_illuminance);
- float moon_y = color::aces::ap1<float>.luminance(moon_transmitted_illuminance);
- float3 dominant_light_direction = (sun_y > moon_y) ? sun_direction : moon_direction;
- float3 dominant_light_illuminance = (sun_y > moon_y) ? sun_illuminance : moon_illuminance;
-
- if (moon_y > sun_y)
- sun_luminance *= 0.0f;
-
- // Render sky illuminance LUT
- auto sky_lut_viewport = sky_lut_framebuffer->get_dimensions();
- rasterizer->set_viewport(0, 0, std::get<0>(sky_lut_viewport), std::get<1>(sky_lut_viewport));
- rasterizer->use_framebuffer(*sky_lut_framebuffer);
- rasterizer->use_program(*sky_lut_shader_program);
- sky_lut_light_direction_input->upload(dominant_light_direction);
- sky_lut_light_illuminance_input->upload(dominant_light_illuminance);
- sky_lut_atmosphere_radii_input->upload(atmosphere_radii);
- sky_lut_observer_position_input->upload(observer_position);
- sky_lut_rayleigh_parameters_input->upload(rayleigh_parameters);
- sky_lut_mie_parameters_input->upload(mie_parameters);
- sky_lut_ozone_distribution_input->upload(ozone_distribution);
- sky_lut_ozone_absorption_input->upload(ozone_absorption);
- sky_lut_airglow_illuminance_input->upload(airglow_illuminance * ctx.exposure);
- if (sky_lut_resolution_input)
- sky_lut_resolution_input->upload(sky_lut_resolution);
- sky_lut_transmittance_lut_input->upload(transmittance_lut_texture);
- if (sky_lut_transmittance_lut_resolution_input)
- sky_lut_transmittance_lut_resolution_input->upload(transmittance_lut_resolution);
- rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangles, 0, 6);
-
-
-
- rasterizer->use_framebuffer(*framebuffer);
- auto viewport = framebuffer->get_dimensions();
- rasterizer->set_viewport(0, 0, std::get<0>(viewport), std::get<1>(viewport));
- float2 resolution = {static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))};
-
- // Draw atmosphere
- if (sky_model)
- {
- rasterizer->use_program(*sky_shader_program);
-
- // Upload shader parameters
- if (model_view_projection_input)
- model_view_projection_input->upload(model_view_projection);
- if (mouse_input)
- mouse_input->upload(mouse_position);
- if (resolution_input)
- resolution_input->upload(resolution);
- if (light_direction_input)
- light_direction_input->upload(dominant_light_direction);
- if (sun_luminance_input)
- sun_luminance_input->upload(sun_luminance);
- if (sun_angular_radius_input)
- sun_angular_radius_input->upload(sun_angular_radius * magnification);
- if (atmosphere_radii_input)
- atmosphere_radii_input->upload(atmosphere_radii);
- if (observer_position_input)
- observer_position_input->upload(observer_position);
- if (sky_illuminance_lut_input)
- sky_illuminance_lut_input->upload(sky_lut_texture);
- if (sky_illuminance_lut_resolution_input)
- sky_illuminance_lut_resolution_input->upload(sky_lut_resolution);
-
- sky_material->upload(ctx.alpha);
-
- rasterizer->draw_arrays(*sky_model_vao, sky_model_drawing_mode, sky_model_start_index, sky_model_index_count);
- }
-
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE);
- //glBlendFunc(GL_ONE, GL_ONE);
-
- // Draw stars
- if (stars_model)
- {
- float star_distance = (clip_near + clip_far) * 0.5f;
-
- model = float4x4(float3x3(icrf_to_eus.r));
- model = math::scale(model, {star_distance, star_distance, star_distance});
-
- model_view = view * model;
-
- rasterizer->use_program(*star_shader_program);
- if (star_model_view_input)
- star_model_view_input->upload(model_view);
- if (star_projection_input)
- star_projection_input->upload(projection);
- if (star_distance_input)
- star_distance_input->upload(star_distance);
- if (star_exposure_input)
- star_exposure_input->upload(ctx.exposure);
-
- star_material->upload(ctx.alpha);
-
- rasterizer->draw_arrays(*stars_model_vao, stars_model_drawing_mode, stars_model_start_index, stars_model_index_count);
- }
-
- // Draw moon model
- //if (moon_position.y() >= -moon_angular_radius)
- {
- float moon_distance = (clip_near + clip_far) * 0.5f;
- float moon_radius = moon_angular_radius * moon_distance;
-
- math::transform<float> moon_transform;
- moon_transform.translation = math::normalize(moon_position) * moon_distance;
- moon_transform.rotation = moon_rotation_tween.interpolate(ctx.alpha);
- moon_transform.scale = {moon_radius, moon_radius, moon_radius};
-
- model = math::matrix_cast(moon_transform);
- float3x3 normal_model = math::transpose(math::inverse(float3x3(model)));
-
- rasterizer->use_program(*moon_shader_program);
- if (moon_model_input)
- moon_model_input->upload(model);
- if (moon_view_projection_input)
- moon_view_projection_input->upload(view_projection);
- if (moon_normal_model_input)
- moon_normal_model_input->upload(normal_model);
- if (moon_camera_position_input)
- moon_camera_position_input->upload(ctx.camera_transform.translation);
- if (moon_sunlight_direction_input)
- moon_sunlight_direction_input->upload(math::normalize(moon_sunlight_direction_tween.interpolate(ctx.alpha)));
- if (moon_sunlight_illuminance_input)
- moon_sunlight_illuminance_input->upload(moon_sunlight_illuminance_tween.interpolate(ctx.alpha) * ctx.exposure);
- if (moon_planetlight_direction_input)
- moon_planetlight_direction_input->upload(math::normalize(moon_planetlight_direction_tween.interpolate(ctx.alpha)));
- if (moon_planetlight_illuminance_input)
- moon_planetlight_illuminance_input->upload(moon_planetlight_illuminance_tween.interpolate(ctx.alpha) * ctx.exposure);
-
- moon_material->upload(ctx.alpha);
- rasterizer->draw_arrays(*moon_model_vao, moon_model_drawing_mode, moon_model_start_index, moon_model_index_count);
- }
- }
-
- void sky_pass::set_sky_model(const model* model)
- {
- sky_model = model;
-
- if (sky_model)
- {
- sky_model_vao = model->get_vertex_array();
-
- const std::vector<model_group*>& groups = *model->get_groups();
- for (model_group* group: groups)
- {
- sky_material = group->get_material();
- sky_model_drawing_mode = group->get_drawing_mode();
- sky_model_start_index = group->get_start_index();
- sky_model_index_count = group->get_index_count();
- }
-
- if (sky_material)
- {
- sky_shader_program = sky_material->get_shader_program();
-
- if (sky_shader_program)
- {
- model_view_projection_input = sky_shader_program->get_input("model_view_projection");
- mouse_input = sky_shader_program->get_input("mouse");
- resolution_input = sky_shader_program->get_input("resolution");
- light_direction_input = sky_shader_program->get_input("light_direction");
- sun_luminance_input = sky_shader_program->get_input("sun_luminance");
- sun_angular_radius_input = sky_shader_program->get_input("sun_angular_radius");
- atmosphere_radii_input = sky_shader_program->get_input("atmosphere_radii");
- observer_position_input = sky_shader_program->get_input("observer_position");
- sky_illuminance_lut_input = sky_shader_program->get_input("sky_illuminance_lut");
- sky_illuminance_lut_resolution_input = sky_shader_program->get_input("sky_illuminance_lut_resolution");
- }
- }
- }
- else
- {
- sky_model_vao = nullptr;
- }
- }
-
- void sky_pass::set_moon_model(const model* model)
- {
- moon_model = model;
-
- if (moon_model)
- {
- moon_model_vao = model->get_vertex_array();
-
- const std::vector<model_group*>& groups = *model->get_groups();
- for (model_group* group: groups)
- {
- moon_material = group->get_material();
- moon_model_drawing_mode = group->get_drawing_mode();
- moon_model_start_index = group->get_start_index();
- moon_model_index_count = group->get_index_count();
- }
-
- if (moon_material)
- {
- moon_shader_program = moon_material->get_shader_program();
-
- if (moon_shader_program)
- {
- moon_model_input = moon_shader_program->get_input("model");
- moon_view_projection_input = moon_shader_program->get_input("view_projection");
- moon_normal_model_input = moon_shader_program->get_input("normal_model");
- moon_camera_position_input = moon_shader_program->get_input("camera_position");
- moon_sunlight_direction_input = moon_shader_program->get_input("sunlight_direction");
- moon_sunlight_illuminance_input = moon_shader_program->get_input("sunlight_illuminance");
- moon_planetlight_direction_input = moon_shader_program->get_input("planetlight_direction");
- moon_planetlight_illuminance_input = moon_shader_program->get_input("planetlight_illuminance");
- }
- }
- }
- else
- {
- moon_model = nullptr;
- }
- }
-
- void sky_pass::set_stars_model(const model* model)
- {
- stars_model = model;
-
- if (stars_model)
- {
- stars_model_vao = model->get_vertex_array();
-
- const std::vector<model_group*>& groups = *model->get_groups();
- for (model_group* group: groups)
- {
- star_material = group->get_material();
- stars_model_drawing_mode = group->get_drawing_mode();
- stars_model_start_index = group->get_start_index();
- stars_model_index_count = group->get_index_count();
- }
-
- if (star_material)
- {
- star_shader_program = star_material->get_shader_program();
-
- if (star_shader_program)
- {
- star_model_view_input = star_shader_program->get_input("model_view");
- star_projection_input = star_shader_program->get_input("projection");
- star_distance_input = star_shader_program->get_input("star_distance");
- star_exposure_input = star_shader_program->get_input("camera.exposure");
- }
- }
- }
- else
- {
- stars_model = nullptr;
- }
- }
-
- void sky_pass::update_tweens()
- {
- observer_position_tween.update();
- sun_position_tween.update();
- sun_luminance_tween.update();
- sun_illuminance_tween.update();
- icrf_to_eus_translation.update();
- icrf_to_eus_rotation.update();
-
- moon_position_tween.update();
- moon_rotation_tween.update();
- moon_angular_radius_tween.update();
- moon_sunlight_direction_tween.update();
- moon_sunlight_illuminance_tween.update();
- moon_planetlight_direction_tween.update();
- moon_planetlight_illuminance_tween.update();
- moon_illuminance_tween.update();
- }
-
- void sky_pass::set_magnification(float magnification)
- {
- this->magnification = magnification;
- }
-
- void sky_pass::set_icrf_to_eus(const math::transformation::se3<float>& transformation)
- {
- icrf_to_eus_translation[1] = transformation.t;
- icrf_to_eus_rotation[1] = transformation.r;
- }
-
- void sky_pass::set_sun_position(const float3& position)
- {
- sun_position_tween[1] = position;
- }
-
- void sky_pass::set_sun_illuminance(const float3& illuminance, const float3& transmitted_illuminance)
- {
- sun_illuminance_tween[1] = illuminance;
- sun_transmitted_illuminance = transmitted_illuminance;
- }
-
- void sky_pass::set_sun_luminance(const float3& luminance)
- {
- sun_luminance_tween[1] = luminance;
- }
-
- void sky_pass::set_sun_angular_radius(float radius)
- {
- sun_angular_radius = radius;
- }
-
- void sky_pass::set_planet_radius(float radius)
- {
- atmosphere_radii.x() = radius;
- atmosphere_radii.y() = atmosphere_radii.x() + atmosphere_upper_limit;
- atmosphere_radii.z() = atmosphere_radii.y() * atmosphere_radii.y();
- observer_position_tween[1] = {0.0f, atmosphere_radii.x() + observer_elevation, 0.0f};
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- void sky_pass::set_atmosphere_upper_limit(float limit)
- {
- atmosphere_upper_limit = limit;
- atmosphere_radii.y() = atmosphere_radii.x() + atmosphere_upper_limit;
- atmosphere_radii.z() = atmosphere_radii.y() * atmosphere_radii.y();
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- void sky_pass::set_observer_elevation(float elevation)
- {
- observer_elevation = elevation;
- observer_position_tween[1] = {0.0f, atmosphere_radii.x() + observer_elevation, 0.0f};
- }
-
- void sky_pass::set_rayleigh_parameters(float scale_height, const float3& scattering)
- {
- rayleigh_parameters =
- {
- -1.0f / scale_height,
- scattering.x(),
- scattering.y(),
- scattering.z()
- };
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- void sky_pass::set_mie_parameters(float scale_height, float scattering, float extinction, float anisotropy)
- {
- mie_parameters =
- {
- -1.0f / scale_height,
- scattering,
- extinction,
- anisotropy
- };
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- void sky_pass::set_ozone_parameters(float lower_limit, float upper_limit, float mode, const float3& absorption)
- {
- ozone_distribution =
- {
- 1.0f / (lower_limit - mode),
- 1.0f / (upper_limit - mode),
- mode
- };
- ozone_absorption = absorption;
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- void sky_pass::set_airglow_illuminance(const float3& illuminance)
- {
- airglow_illuminance = illuminance;
- }
-
- void sky_pass::set_moon_position(const float3& position)
- {
- moon_position_tween[1] = position;
- }
-
- void sky_pass::set_moon_rotation(const math::quaternion<float>& rotation)
- {
- moon_rotation_tween[1] = rotation;
- }
-
- void sky_pass::set_moon_angular_radius(float angular_radius)
- {
- moon_angular_radius_tween[1] = angular_radius;
- }
-
- void sky_pass::set_moon_sunlight_direction(const float3& direction)
- {
- moon_sunlight_direction_tween[1] = direction;
- }
-
- void sky_pass::set_moon_sunlight_illuminance(const float3& illuminance)
- {
- moon_sunlight_illuminance_tween[1] = illuminance;
- }
-
- void sky_pass::set_moon_planetlight_direction(const float3& direction)
- {
- moon_planetlight_direction_tween[1] = direction;
- }
-
- void sky_pass::set_moon_planetlight_illuminance(const float3& illuminance)
- {
- moon_planetlight_illuminance_tween[1] = illuminance;
- }
-
- void sky_pass::set_moon_illuminance(const float3& illuminance, const float3& transmitted_illuminance)
- {
- moon_illuminance_tween[1] = illuminance;
- moon_transmitted_illuminance = transmitted_illuminance;
- }
-
- void sky_pass::set_transmittance_lut_resolution(std::uint16_t width, std::uint16_t height)
- {
- transmittance_lut_texture->resize(width, height, nullptr);
- transmittance_lut_framebuffer->resize({transmittance_lut_texture->get_width(), transmittance_lut_texture->get_height()});
- transmittance_lut_resolution = {static_cast<float>(width), static_cast<float>(height)};
-
- // Trigger transmittance LUT render
- render_transmittance_lut = true;
- }
-
- } // namespace render
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